fx-82MS fx-82TL fx-9860GII TI-83
REPLAY
On a Casio calculator you can can scroll the lines and move the cursor over the display to replay operations
△ ◁ REPLAY ▷ ▽
You can check data during and after entry by scrolling, using up 
△ and down ▽. Use left ◁▷ to move the cursor to the location you want.
Example 1
To change 12.53 × 456 in 12.53 + 456
12.53×456
5,713.68+ 12.53+456
5,713.68= 12.53+456
468.53
Example 2
To delete a number for correcting 122 × 345 in 12 × 345
122×345
42,090.DEL = 12×345
4,140.
Example 3
To change to an insert cursor ░ for correcting 13 × 456 in 123 × 456
SHIFT INS DEL 1░×456
5,928.2 = 123×456
56,088.
Example 4
To switch to another display part of the standard settings
MODE 1 ab/c d/c
1 2Dot Comma
1 2
Example 5
To scroll the data in standard deviation (SD mode)
x1=
10.Freq1=
12.
and so on ...
Example 6
To scroll the data in linear regression (REG mode)
x1=
10.y1=
34.Freq1=
1.
and so on ...
Example 7
To delete the 2nd entry in standard deviation (SD mode)
SHIFT M− x2=
14.M+ x1=
10.DT└CL┘
Deleting a data value causes all values following it to be shifted up.
Example 8
To correct the 4th entry in standard deviation (SD mode)
x4=
25.7 7_
25.= x4=
7.